TM 1-1520-238-T-6
9–599
9–304. CIRCUIT PROTECTION SYSTEM (DC EMERGENCY BUS – CPG STATION) –
9–304
MAINTENANCE OPERATIONAL CHECK (cont)
EMERG BATT
ICS
EMERG BATT
VHF AM / FM
EMERG BATT
ENG INST
EMERG BATT
UTIL SEC LT
EMERG BATT
CAUT
M69-257
Figure 9–195.
CPG Circuit Breaker Panel 1
Task
Result
d. On pilot ELEC PWR panel (fig. 9–194), set
BATT/EXT PWR switch to EXT PWR.
Check for 28 VDC at P769-C.
If 28 VDC is not present at, go to paragraph 9–311.
e. On pilot ELEC PWR panel, set BATT/EXT
PWR switch to OFF and check for continuity
between (A77)J4-C and CB29-1.
If continuity does not exist, go to paragraph 9–311.
f. Check for continuity between (A77):
J4-C and J1-5.
If continuity does not exist, go to paragraph 9–306.
g. Check for continuity between (A77):
J4-C and J1-7.
If continuity does not exist, go to paragraph 9–307.
h. Check for continuity between (A77):
J4-C and J1-8,
J4-C and J1-10.
If continuity does not exist, go to paragraph 9–308.
i. Check for continuity between (A77):
J4-C and J1-2,
J4-C and J1-3.
If continuity does not exist, go to paragraph 9–310.
j. Check for continuity between (A77):
J4-C and J1-4.
If continuity does not exist, go to paragraph 9–310.
2. Install CPG circuit breaker panel 1 (TM 1-1520-238-23).
3. Perform EXTERNAL POWER – POWER DOWN (para 9–46).
END OF TASK
